Zeolite ZSM-57 and catalysis therewith

Abstract

This invention relates to a synthetic porous zeolite, identified as ZSM-57, a method for its preparation and use thereof in catalytic conversion of organic compounds. This crystalline material may have a ratio of XO2: Y2O3 of at least 4, wherein X represents silicon and/or germanium and Y represents aluminum, boron, chromium, iron and/or gallium. The silica/alumina form of this crystalline material has a silica to alumina ratio of at least 4 and may be prepared with directing agents which are N,N,N,N',N',N'-hexaethylpentane-diammonium compounds. The crystalline material exhibits a characteristic X-ray diffraction pattern.

What is claimed is: 
     
       1. A process for effecting catalytic conversion of an organic charge which comprises contacting said charge under catalytic conversion conditions with a catalyst comprising a catalytically effective amount of a synthetic porous crystalline zeolite having a molar ratio of XO 2  : Y 2  O 3  of at least 4, wherein X represents silicon and/or germanium and Y represents aluminum, boron, chromium, iron and/or gallium, said porous crystalline zeolite having at least the X-ray diffraction lines as set forth in Table 1 of the specification. 
     
     
       2. A process according to claim 1, wherein said zeolite is an aluminosilicate zeolite having a silica to alumina molar ratio of at least 4. 
     
     
       3. A process according to claim 1, wherein toluene is alkylated with methanol to produce xylenes, said process comprising contacting said toluene and said methanol with said catalyst under conditions comprising a temperature of from about 340° C. to about 500° C., a pressure of from about atmospheric to about 200 atmospheres, a weight hourly space velocity of from about 2 to about 2000 and a toluene to methanol mole ratio of from about 1:1 to about 20:1. 
     
     
       4. A process according to claim 3, wherein said zeolite is an aluminosilicate zeolite having a silica to alumina molar ratio of at least 4. 
     
     
       5. A process according to claim 1, wherein toluene is disproportionated to produce benzene and xylenes, said process comprising contacting said toluene with said catalyst under conditions comprising a temperature of from about 200° C. to about 760° C., a pressure of from about atmospheric to about 60 atmospheres and a weight hourly space velocity of from about 0.08 to about 20. 
     
     
       6. A process according to claim 5, wherein said zeolite is an aluminosilicate zeolite having a silica to alumina molar ratio of at least 4. 
     
     
       7. A process according to claim 1, wherein propane is converted to produce a mixture comprising light olefins and aromatics, said process comprising contacting said propane with said catalyst under conditions comprising a temperature of from about 100° C. to about 700° C., a pressure of from about 0.1 atmosphere to about 60 atmospheres, a weight hourly space velocity of from about 0.5 to about 400 and a hydrogen/propane mole ratio of from about 0 to about 20. 
     
     
       8. A process according to claim 7, wherein said zeolite is an aluminosilicate zeolite having a silica to alumina molar ratio of at least 4. 
     
     
       9. A process according to claim 1, wherein a refinery off gas is upgraded to produce liquid product enriched in BTX, said process comprising contacting said off gas with said catalyst under conditions comprising a temperature of from about 100° C. to about 700° C., a pressure of from about 0.1 atmosphere to about 60 atmospheres, a weight hourly space velocity of from about 0.5 to about 400 and a hydrogen to hydrocarbon mole ratio of from about 0 to about 20. 
     
     
       10. A process according to claim 1, wherein said charge comprises one or more C 1  -C 4  alcohols and/or C 2  -C 4  ethers and said alcohols and/or ethers are converted to hydrocarbons under conditions comprising a temperature of from about 300° C. to about 550° C., a pressure of from about 0.01 psi to about 2000 psi and a liquid hourly space velocity of from about 0.5 to about 100. 
     
     
       11. A process according to claim 10, wherein said conditions comprise a temperature of from about 370° C. to about 500° C., a pressure of from about 0.1 psi to about 500 psi, and a liquid hourly space velocity of from 0.5 to about 100. 
     
     
       12. A process according to claim 10, wherein said one or more alcohols and/or ethers is methanol.